CVE-2025-66103

WordPress WPCal.io plugin <= 0.9.5.9 - Cross Site Scripting (XSS) vulnerability

6.5 Medium

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in revmakx WPCal.io wpcal allows DOM-Based XSS.This issue affects WPCal.io: from n/a through <= 0.9.5.9.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: Required

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: Low

Exploit likelihood

0.23%Up 0.2 points since Dec 31, 2025

What each source reports

CVE List Score used 6.5

WordPress WPCal.io plugin <= 0.9.5.9 - Cross Site Scripting (XSS) vulnerability

Record: CVE-2025-66103
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Weakness: CWE-79
Updated: 2026-11-02

EUVDEUVD-2025-205806 6.5

Record: EUVD-2025-205806
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Updated: 2026-11-02

GitHub AdvisoriesGHSA-5f5g-3v7q-886j 6.5

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')...

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Revmakx WPCal.Io allows DOM-Based XSS.This issue affects WPCal.Io: from n/a through 0.9.5.9.

Record: GHSA-5f5g-3v7q-886j
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Weakness: CWE-79
Updated: 2026-11-02

NVD 6.5

Record: CVE-2025-66103
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Weakness: CWE-79
Updated: 2026-11-02

Affected products

revmakx wpcal.io

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-66103 is a medium vulnerability (CVSS 6.5) in Revmakx Wpcal.io, published December 30, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.23%, the 14th percentile. No source names a fixed version.